Pump.



M. T. & M. C. CHAPMAN.

PUMP. APPLICATION PLED APR. 19, 1911. 1,1 14,230, Patented 0013.20, 1914.

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M. T. L M. C. CHAPMAN..

PUMP. l APPLICATION FILED APR. 19, 1911.

Patented Oct. 20, 1914.

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MATTHEW T. CHAPMAN AND MARK C. TO THE AMERICAN WELL WORKS, ILLINOIS.

CHAPMAN, F AURORA, ILLINOIS, ASSIGNORS OF AURORA, ILLINOIS,A CORPORATION 0F 'i PUMP.

To all whom t may concern Be it known that we, MATTHEW T. CHAP- MAN and MARK C. CHAPMAN, citizens of the United States, residing at Aurora, in the county of Kane and State of Illinois, have invented certain new and useful Improve- Y mentsin Pumps, of which the following is a specification, reference being had to the accompanying drawings.

ur invention relates to pumps, and has to do more particularly with pumps of the centrifugal type.

' tion with separate discharges so as to furtion and increasing the efficiency o nish a greater volume of water at less pressure. Also to provide a construction in which, when the several units are connected to a common discharge, the lateral pressure upon the pistons or vrunners will be automatically equalized, thereby preventin frigt e pump.

We accomplish our object as illustrated in the drawings andas hereinafter described. What we'regard as newis set forth in the claims.

In the accompanying drawings,T-Figure 1 is an 'elevation illustrating our improved pump, some parts being broken away; Fig. 2 is a sectional view illustrating the construction ofthe pump units ;l Fig. 3 is an enlarged detail, showing some'of the pipe connections and the valve-operating lever; Fig. 4 is a sectional view of the parts shown in Fig. 3; Fig. 5 is a longitudinal vertical section illustrating the devices for adjusting'thepistons to avoid lateral frlction; and Fig. 6 is an end view of the parts shown 1n Fig. 5, some parts being in section.

Referring to the drawings,-7` indicates a well, and 8-9 well-tubes which extend down .thereinto and form suction pipes through which the water is drawn the` action of the4 pumping mechanism.

These suction-pipes are provided at or near their lower ends with inclined check-valves 88k, as shown at'the left 1. The pur- Speci'lication of Letters Patent.

Application filed April 19, 1911.

Aing pumping unit 10 up byr pumping unit v11 through pipe 27 and `cou- Patented Oct. 20, 1914. Serial N o. 622,010.

pose of these check-valves is hereinafter set forth.

1.0*11 indicate what may be termed the units of a multiple centrifugal pump, each of saidunits comprising an annular shell or easing 1n which are mounted rotary runners 12-13, respectively. As best shown in Fig. 2, said runners are oppositely-disposedupon a shaft 14 which extends axially through the pump chambers and are non-rotatably secured thereto by pins 15, or other suitable means. Preferably the runners are not mounted directly upon the shaft 14', but are screwed upon the end portions of a sleeve 16- wlnch fits upon the shaft and is journaled in a bushing 17 fitted in a frame 18 .which rises from a suitable base 19. Heads 20-21 are fitted over the outer faces of the run- 'ners 12-13 and are connected with the frame 18 by rings` 22, thus vforming chambers for the runners 12-l3. The head 20 is connected with the pipe 8 by an elbow 23, and the head 21 is conneetedwith the pipe 9 by a T-coupling 24, as best shown in Fig. l. As therein shown. the shaft 14 extends out through the coupling 24 and its outer portion is journaled in a bearing which will be hereinafter described. i 22a indicates a priming opening for primwhen starting e the pump. f

25 indicates an outlet pipe connected with the pumping unit 10 by'a T-coupling 26 which also serves asa valve-chamber, aswill presently be described.'l` 27 indicates a pipe which connects T-coupling 24 with the coupling 26, asshown inFig. 1. Wl A i" 28 indicates an outlet pipe connected with the pumping unitf-llffAs shownI in Figfl, the pipe- 25 also connects at its upper end with the outlet pipe 28. f* As shown in Fig. 4, the coupling 26 is provided with a dis -valve'29whi'ch' is vpivoted at 30 and is adapted to be swung from the vertical position shown in F ig. 4 to the horizontal position indicated by 'dotted lines-in said figure. When `in the former osition, the valve 29 is seated against'the ange 31 of a collar`32, and whenzin the :latter position is seated-'against the ang'e33 lof a collar '34; It will be obvious that by means of the valve 29 thepumping unitlO 'may be connected eitherfwith vthe outlet 25201 with the j the water from passing down into the Well. The check-valves in both pipes also enable over to the position shown in dotted lines in ball bearings for preventing friction due to end thrust thereof in either direction. In

pling 24, and'that when Water is admitted l from pumping unit'10 to pumping unit 11 in l the manner described it will enter the pumping unit 11 at the side opposite that at which it enters the pumping unit 10 from pipe 23. In the latter case the lateral pressure upon the tivo pumping units will be in opposite directions so that they will be balanced. Then pumping unit 10 is connected With pumping unit 11, the check-valve 8a in the suction pipe 9 will close, thereby preventing the pipes 8-9 to retain Water for priming purposes in starting the pumps, as, for eX- ample, when pump -10 is to be started the pipe Shis filled With Water, the check-valve 8a in said pipe being in closed position. After the pump 10 is started, pump 11 may be primed by Water supplied to it from pump 10.

As shown in Fig. 3, the pivot 30 projects beyond the coupling 26 and carries a lever 35 provided near its outer end with a Weight 36. When the lever 35 is in the position shown in Fig. 3, the valve 29 will be held in the position shown in full lines in Fig. 4, Whereas, when the lever 35 is in the position shown in dotted lines in Fig. 3 the valve 29 Willoccupy the position shown in dotted lines in Fig. 4. The function of the Weight 36 is to assist in holdin the lever 35 in its dierent positions of adjustment, but more particularly for holding it in the position shown in dot'ted lines in Fig. 3.

It will be apparent from the foregoing description that with the lever 35 in the position shown in Figs. 1 and 3 each pumping unit will deliver its output directly to outlet pipe 28. When greater pressure is required, as for fire service, by throwing the lever 35 Fig. 3, the discharge of pumping unit 10 is connected with theinlet of unit 11 so that the discharge from both units will be delivered through pipe 28 at double the pressure of a single unit.

In order to adjust the runners and to avoid lateral friction, the outer end of the shaft 14 is fitted in a lbearing constructed to prevent endwise movement of the shaft and having the construction shown this bearing comprises a cylindrical member 37 having a transverse intermediate partition 38 perforated for the passage of the pump-shaft 14, as shown in Fig. 5. The cylinder 37 is connected with the coupling 24 by rods 39-40 and an annular yoke 41 having bosses 42 through which-said rods pass, as shown in Figs. 5 and 6. The yoke 41 is pivotally connected with the cylinder 37 at opposite sides 'oy trunnions or pivots 43, so that it may rock independently of said cylinder. Thus the cylinder 37 ris maintained properly in alinement with the shaft 14. For conveniently connecting the rods 39-40 With the coupling 24, the latter is provided With a flange 44, as shown in Fig. 1.

51-52 indicate annular disks, which are fitted tightly in the cylinder 37 adjacent to and at opposite sides of the partition, and

53-'54 indicate annular bands which tit tightly within the disks 51-52. The shaft 14 rotates freely Within the bands 53-54, which are held non-rotatably by reason of their engagement with the disks 51-52.

55-56 indicate disks similar to the disks 51-52, which are fitted loosely between the bands 53-54 and the inner Wall of the cylinder 37.

57 indicates anti-friction balls fitted between the disks 51--55 and 52-56, respectively, thus forming anti-friction bearings for supporting the disks 55-56. The collars 45-46 bear against the disks 55-56, which thus form anti-friction end bearings for re-` ceiving the end thrust in either direction of the shaft 14. By adjusting the position of the cylinder 37 by means of the rods 39-40 the shaft 14 may be moved endwise and consequently the position of the runners 12-13 carried thereby may be accurately controlled. By this construction the anti-friction bearings act' to assist in adjusting the runners to prevent lateral friction thereof and also hold them properly centered in their respective housings.

58-59 indicate caps which screw into the ends of the cylinder 37 and tightly close the same so that the compartments thus provided therein may be used to contain a supply of any suitable lubricant.

We do not herein claim separately the incorporation in a. centrifugal pump of oppositely-disposed Irunners or pistons arranged in connection with inlet pipes so as to equalize or balance the lateral pressure upon the runners and'thereby balance the same so that lateral friction is substantially avoided, as that invention forms the subject of a separate ap lication tiled by us on April 3, 1911, Serial i o. 618,646.

While our improved pumping apparatus is designed more particularly for pumping water, it may be used for pumping any other suitable liquid. I

That which We claim as our invention, and desire to secure by Letters Patent, is,-

1. A pumping-apparatus, comprising a pair of pumping units having an axiallydisposed shaft, runners mounted on said shaft, supply pipes communicating with opposite-sides of said pumping units, respectively, discharge pipes connected with said units, respectively, an outlet pipe separately a clapper-va-lve arranged to close either said connecting pipe or the discharge pipe of one of said units, and means adapted tohold said clapper-valve in either of its two operative positions.

Q. A pumping-apparatus, comprising a pair of pumping units having an axially disposed shaft, runners mounted on said shaft, supply pipes communicating with opposite sides of said pumping units, respectively, discharge pipes connected with said units, respectively, and separately communicating with a common outlet, a pipe connecting the discharge of one of said units with the supply of the other unit, a clapper-valve arranged to close either said connecting pipe or the discharge pipe of one of said units, and a Weighted lever connected with said clapper-valve 'adapted to assist in holding said valve in either of its two operative positions.

3. A pumping-apparatus, comprising a plurality of rotary pumping units, supply pipes connected with said units, respectively, an outlet pipe separately connected With each of said units, means connecting the discharge of one of said units with the inlet of another unit, a valve for controlling the flow of water through said connecting means, and back-pressure valves in said supply pipes.

4. A pumping-apparatus, comprising a pair of pumping units having an axiallydisposed shaft, runners mounted on said shaft, supply pipes .communicating with opposite sides of said pumping units, discharge pipes connected With said units, respectively, an outlet pipe separately connected with each of said discharge pipes, a pipe connecting the discharge of onepf said units with the supply oft' the other unit, a valve for controlling the. flow of Water through said connecting pipe, and hack-pressure valves in said supply pipes.

A pumpinghpparatus, comprising a pair of pumping units having an axiallydisposed shaft, runners mounted on said shaft, supply pipesl communicating with opposite sides of vsaid pumping units, discharge pipes connected with said units, respectively, an outlet pipe separately connected With each of said discharge pipes, a pipe connecting the discharge of one of said units With the supply of the other unit, a valve for controlling the flow oi' Water through said connecting. pipe, and anti-friction bearings arranged to sustain said runners against end thrust. in either direction.

MATTHEW T. CHAPMAN.. I MARK C. CHAPMAN. 

